Projection apparatus.



PRGJEGTION APPARATUS.

APPLIGATIUN PILE@ JAN-15, 1910.

- Patented June 28,1910.

3 SHEETS-SHEET 1.

A. Emi. P D PE 1 s SHEETS-SHEET 2A A. H. F.

PROJECTION A APPLICATION HL atented June 28,1910.

` A. H. F. PERL PROJEGTON APPARATUS.

APPLICATION FILED J'AL, 1910.

?at6nt6d June 28, 1910.

3 SHEETS-SHEET 3.

UNITED STATES PirENT OFFICE.

ALBERT HENRY FRANKS PEBL, 0F LONDON, ENGLAND.

PROJ ECTION APPARATUS.

speuncaaon at Letters raient. Patented J une 28, 1910. Application tiled January 15, 1910.

Serial No. 538,225.

To all whom it may concern:

Be it known that I, ALBERT HENRY FRANKS PERL, a subject of His Ma'esty the King of England, residing at aymond House, Theobalds Road7 Grays Inn, in the county of London, Kingdom of En land, have invented certain new and usefu Improvements in and Relating to Projection Apparatus, of which the following is a speciication.

This invention relates to improvements in connection with advertising or entertaining and relates more particularly to mirrors or screens used in connection with magic lanterns for receiving pictures or projections.

The invention consists in the arrangement whereby the translucent screen' is employed between a transparent mirror and the lantern and in the combination therewith of exterior reflect-ing devices.

N ow according to my invention I provide a frosted glass, paper, or other likevtrans lucent screen for receiving the projections or pictures on the inner or lantern side of an inclosed casing and in combination therewith a transparent mirror on the outer or visible side so that the ictures or advertising mat-ter can be eectively thrown on to a screen and will appear clearly through the mirror, while when the Screen is darkened or not in use the mirror alone is effective or visible. In combination with the two before-mentioned screens I also employ attract-ive exterior reflecting devices to be switched into operation at the intervals between the changes of scenes or other advertising matter. These said devices may conveniently be formed as reflecting columns and be revolved to give a translator-y or moving eiiectto the mirror as if the screen were itself being moved.

In the accompanying drawings with reference to which my invention is hereinafter described -Figure l is a. side elevation of an advertising or displaying apparatus for use in shop windows or like laces, the side of the casing being removed). Fig. 2 is a front elevation thereof, the front frame being removed; Fig. 3 is a sectional front elevation taken partly on the line 3-3 Fig. l; Fig. 4 is a part sectional plan of the mechamsm shown in Fig. 2; Fig. 5 is a detached view of one of my preferred forms of revolving column used 1n conjunction with the apparatus.. l

carrying my invention mto practice as illustrated in Figs. l to 5 of the drawings, I mount a mirror a and screen a so as to form one side or end of a box or casing b, the transparent mirror of course being outermost. A magic lantern c is arranged at the opposite end of the casing and the pictures or advertisements are projected on to the screen a and automatically changed periodically by convenient electric clockwork or other driving gear, that shown being electric.I

The changing mechanism as shown comprises a suitable motor d arranged within the casing l and havin a pulley wheel e on its shaft by means o which the double pulley wheel f f' is rotated. These wheels are keyed ony a shaft g which by means of suitable worm gear Iz, rotates the wheel i and shaft To the outer end of this shaft j is keyed a crank disk Il: which actuates the revolving disk Z carrying the slides l' by means of a connecting rod m, reciprocating or swinging arm n, Weighted pawl o and l ratchet wheel o in the Well known manner. Also secured on this shaft j is a cam p that actuates a spring controlled lever r operatmg the shut-ter .s by means of a rod t, and in addition serves to open and close the lamp circuit u u.

The screen a itself could conveniently be made of thin paper, opal glass or any other material that would serve the purpose and at the same time be sufliciently transparent to allow the rays of light to pass to the mirror a. If desired semi-transparent paint might be used on the mirror itself or on a separate sheet of glass.

The exterior reecting devices employed comprise a pair of spirally wound vertical columns w 'w placed one on either side of the mirror; these are partly inclosed or shielded by silvered reflecting surfaces that abut against the surface of the mirror a along their inner edges. The columns are driven by means of a cross shaft y and ulley e from the wheel f. Wheels or dis is Z are mounted on the shaft y and the columns 'w are guided in suitable supports and rest upon the wheels Z being rotated thereby. The columns as shown are spirally wound with double rows of colored beads or imitation stones 'w' which reflect the light given out by a pair of adjacently situated elongated electric incandescent lamps 2, the reected rays passing between the edges of the reliectors and the silvered back o the glass a. Reiieetors 3 are rovided for the lam s 2 to keep the light om the interior of t e casing b. The revolving` columnsrproduce a translatory eifect upon the glassa. These devices are automatically brought into operation by means ofa stv-itch circuit (u o) alternately with the refiectioz of the 1antern, or if desired at the end ofv a series or setof pictures or displays, andare arranged, if required, to work at varying speeds.

It will be seen that I amenabled to pror vide an eicient mirror and at the same time a. practically erfect'screen while also rovi inganove and eifectivci method o attracting attention.

What I claim and desiiie to secure by Let- Patent of the United States is "'1. In almagic lantern apparatus for use in connection with advertising or entertaining, the combination with a ma ic lantern of a transparent mirror, a trans ucent screen between the mirror and the lantern for receiving the projections and exterior reflecting devices adapted to be brought into operation alternately with the projections of the magic lantern,

2. A magic lantern apparatus for use in connection with advertising or entertaining comprising a Ina ie lantern having a rotary slide disk 1n com ination with a box or casing, a transparent mirror at one endv thereof, a screen for receiving the projections from the magic lantern, means for intermittently rotating said slide disk and changin 'the pictures thereon, and a plurality ofV interconnected exterior reflecting columns adapted to be brought into operation alternately with the projections of t e lantern.

In testlmony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing Witnesses.

f ALBERT HENRY Parmis PERL.

Witnesses:

J. M. WILSON, J. S. An'rmins. 

